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The Twilight Sentinel on my '03 STS has developed a mind of it's own - in the off position, soon as the car is taken out of park, the DIC show "headlights suggested".... I can remove the message by clearing the reset button, but it's getting to be a PITA.... if I turn the sentinel on, the headlights come on all the time, even in bright sunlight, and of course this makes it hard to read the dash display, stereo, time, etc...

It looks like there's nothing at the little hole in the defrost grille where the photocell show be - could it have fallen (down) out, or become dis-connected? Anybody have a similar situation?

Thanks in advance

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Mine did that too. I just diconnected the battery and it fixed itself. Hasn't come back since.


- 02 Seville STS, white diamond

- 93 Sixty Special, Tan with vinyl top

- 79 Coupe DeVille, Tan with Tan top

- 06 GMC Sierra Z71, Black

- 92 Silverado C1500, black and grey

- 83 Chevy K10 Silverado, Black and Grey


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The photocell in the dash had gone bad or has disengaged from its mounting surface.

'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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